Batteries for MZ RT RT 125 15 hp
Which battery does a MZ RT RT 125 need?
Specifications and battery: RT 125 (15 hp)
MZ RT RT 125 (15 hp) takes a conventional 9 Ah, 130 A battery (136 × 76 × 140 mm), with the positive terminal on the right.
Battery for this engine
| Version | Technology | Capacity | Cold cranking (EN) | Size (L×W×H) | Polarity |
|---|---|---|---|---|---|
| Main | Conventional | 9 Ah | 130 A | 136 × 76 × 140 mm | + on the right |
This engine shares its battery with the RT 125 Classic (15 hp), RT 125 SM (15 hp), RT 125 SM Blizzard (15 hp), RT 125 SM Cup Replica (15 hp) and 7 more: the compatible batteries are exactly the same.
Data: vehicle specifications and the battery manufacturer's application catalogue.
Battery analysis for your MZ RT RT 125
Quick answer You need an Lead-acid battery of 9 Ah. Our recommendation: VARTA 509015009.
Prices and availability updated on 19/10/2026
Based on the batteries we found for your vehicle, our experts help you pick the right one.
📋 What we found
For your MZ RT RT 125 we found 3 compatible conventional (non Start-Stop) batteries.
⚡ Battery type for your vehicle
✓ Your MZ RT RT 125 does not need a Start-Stop battery. The conventional ones shown fit your vehicle and are the most affordable option. If you want a higher-quality, longer-lasting battery, you can also fit an EFB or AGM as an upgrade — they are fully compatible and last more years.
📊 View AGM vs EFB vs Conventional — full comparison
⭐ Our recommendation
For your MZ RT RT 125 we recommend the VARTA 509015009 (Lead-acid, 9 Ah). It also offers the highest capacity (Ah) and the highest cranking power (CCA) on the list — more headroom in cold starts and with many consumers. Varta is the world's leading manufacturer of starter batteries and supplies first-equipment (OEM) batteries to the major European car makers.
- Next-day delivery if you order before 6 PM.
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Verified selection
- Class: Motorcycle Batteries
- Brand: MZ
- Model: RT
- Engine: RT 125
Conventional Battery
This is a standard or conventional battery for vehicles without a start-stop system
Why we recommend the VARTA 509015009
For €64.90 more: Varta brand.
| RecommendedVARTA 509015009 | CheapestEXIDE 12N9-3B | |
|---|---|---|
| Cold cranking | 85 A | 85 A |
| Capacity | 9 Ah | 9 Ah |
| Technology | PLOMO/ACIDO | PLOMO/ACIDO |
| Why | Varta brand | — |
| Price | €112.40 | €47.50 |
-
Motorcycle battery Varta 12N9-3B (509015008) 12V 9Ah 85A
- 12 V
- 9 Ah
- 85 A
- PLOMO/ACIDO VARTA 509015009 · 9 Ah · 85 A
Dimensions 136×76×140 mm
- ✓ Varta brand
€112.40
-
Motorcycle battery Exide 12N9-3B 12V 9Ah 85A
- 12 V
- 9 Ah
- 85 A
- PLOMO/ACIDO EXIDE 12N9-3B · 9 Ah · 85 A
Dimensions 135×75×140 mm
€47.50
-
Motorcycle battery Varta YB9L-A2 (509016008) 12V 9Ah 130A
- 12 V
- 9 Ah
- 130 A
Dimensions 135×75×139 mm
€117.30
| Category | Make | Reference | Capacity | Cold cranking | Dimensions | Technology | Price | |
|---|---|---|---|---|---|---|---|---|
| Conventional Battery | VARTA | 509015009 | 9 Ah | 85 A | 136×76×140 mm | PLOMO/ACIDO | €112.40 | More info |
| Conventional Battery | EXIDE | 12N9-3B | 9 Ah | 85 A | 135×75×140 mm | PLOMO/ACIDO | €47.50 | More info |
| Conventional Battery | VARTA | 509016013 | 9 Ah | 130 A | 135×75×139 mm | — | €117.30 | More info |
Frequently asked questions
- MZ RT RT 125 (15 hp) takes a conventional 9 Ah, 130 A battery (136 × 76 × 140 mm), with the positive terminal on the right. We found 3 compatible batteries priced between 47,50€ — 117,30€. Check dimensions and positive terminal position before purchasing.
- Yes, you can install a higher capacity (Ah) battery as long as the physical dimensions fit your MZ RT RT 125 battery compartment and the positive terminal position matches.
- Motorcycles can use GEL, AGM, or conventional batteries. GEL batteries are ideal for occasional use. AGM batteries are the best option for heavy use or high-power motorcycles. Always check the polarity before installation.
- Polarity indicates which side has the positive (+) terminal. This is critical for motorcycles because some models have the positive terminal on the left and others on the right. Check the label on your current battery or the manufacturer's manual.
- Yes. First disconnect the negative (−) wire and then the positive (+) wire. When installing the new one, connect the positive (+) wire first and then the negative (−) wire. Always respect the correct polarity.
- Use the search tool by selecting your vehicle's make and model. Our system automatically filters compatible part numbers verified by our technicians. If you have any questions, contact us via WhatsApp.
- All our batteries come with the legal guarantee provided by consumer law against manufacturing defects. If a battery has a manufacturing defect, it will be replaced at no cost to the user.
- Under normal circumstances, batteries usually arrive within 1 to 2 days of ordering. However, there are some cases where delivery may take a little longer: peak seasons (Black Friday, Christmas, etc.), palletized shipments, occasional stock shortages, etc.